The Distance Equation node adds to
Equation 16-18, and the
Distance Equation form contains the following sections for defining the length scale.
Select an option for the Reference length scale lref (SI unit: m):
Automatic (the default) to use
Equation 16-19 to compute
lref, or
Manual to enter a value in the field. The default value, when the scale is not computed automatically, is 1 m (when using SI units).